Troubleshooting - Yamaha YQ50 Service Manual

TROUBLESHOOTING

THE AUXILIARY LIGHT, HEADLIGHT, HEADLIGHT INDICATOR, TAIL LIGHT OR METER
NOTE :
Remove the following parts before proceeding with the troubleshooting :
• Side covers and footrest board
• Handlebar covers
For accurate troubleshooting use the following special tools :
Pocket tester :
90890-03112
1. "LIGHTS" switch
• Disconnect the right handlebar switch cou-
pler from the wire harness.
• Set the switch to "PO" (auxiliary light).
• Check for continuity between
Yellow / Red Q and Blue / Red W
• Set the switch to "ON".
• Check for continuity between:
Yellow / Red Q and Blue / Red W
Yellow / Red Q and Blue E
2. "HI/LO" switch
• Disconnect the "HI/LO" switch coupler (left)
from the wire harness.
• Set the switch to "LO".
• Check for continuity between :
Blue Q and Green/Black W
• Set the switch to "HI".
• Check for continuity between :
Blue Q and Yellow E
LIGHTING SYSTEM
LIGHT DO NOT WORK
CONTINUITY
CONTINUITY
8-17
YR YR
OFF
OFF
P0
P0
ON
ON
B
LW
NO CONTINUITY
Right handlebar switch defect © Replace.
HI
LOW
GB B Y GB
Ch Ch
P BrW
NO CONTINUITY
"HI/LO" switch defect © Replace.
ELEC
YB YB LR LR L
YB L
LR
YR
Y
GB L
-
Dg Dg
BrW L